Dallas is the third largest city in the state of Texas and the ninth largest in the United States. The Dallas - Fort Worth metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States. Divided between Collin, Dallas, Denton, Kaufman, and Rockwall counties, the city had a population of 1,197,816 in 2010, according to the United States Census Bureau [http://en.wikipedia.org/wiki/Dallas]

There is no Vietnamese Embassy in Dallas (United States) therefore from Dallas you are pleased apply visa for Vietnam online. 
Some of travelers and visitors from Dallas they contact with Vietnam Embassy in US in personal to apply Vietnam visa but it's really not easy.
Instead of walking into Vietnam Embassy from Dallas (United States), you can still apply for Vietnam visa online to get a visa approval letter for picking up visa upon arrival at the Vietnam airports. Please submit your online application at http://cheapvietnamvisa.net/en/apply-online.html, make online payment as the guidance and wait for the letter of approval delivered to you via email within 36 hours to 2 working days.

Just a fews click on the site, your visa processing has been our responsibility. Let get your Vietnam visa today from the name you trust.